What makes this deconstruct never be called

I am trying to understand the memory leak. I don't understand why below MyInt deconstruct in main is never called and a memory leak happens.

  class MyInt
    {
        int *_p; 
    public:
        MyInt(int *p = NULL) { _p = p; }
        ~MyInt() 
        { 
            delete _p; 
        }
        int &operator*() { return *_p; }
    };

int main()
{
    double t[] = {1.0, 2.0, 3.0, 4.0, 5.0};
    for (size_t i = 0; i < 5; ++i)
    {
        MyInt *en = new MyInt(new int(i));
        std::cout << **en << "/" << t[i] << " = " << **en / t[i] << std::endl;

    return 0;
}